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Which type of wave causes the ground to shake in a motion parallel to the focus moving straight away from the epicenter?

The type of wave that causes the ground to shake in a motion parallel to the focus moving straight away from the epicenter is a primary (P) wave. P waves are compressional waves that travel through the Earth and are the fastest seismic waves. They are the first to be detected by seismographs during an earthquake.


How far can a person lean with out falling?

Until a straight line from his center of gravity to the center of the Earth no longer passes through his footprints on the ground.


Is 90 degrees straight up?

It could be, but not necessarily. If one ray is parallel to the ground, the other ray could be going straight up, or it could be parallel to the ground also, just going in a different direction. Think of an L. The angle in that L is 90 degrees. You could rotate that L in any direction so that it sticks straight up, or you could rotate it so that it is flat to the ground, or so that it is pointing down. It is still 90 degrees.


What force causes something to fall straight to the ground when it is dropped?

Gravity Actually its not! Its the weight! Were doing a homeowork on physics my physicsa teacher sed it was weight not gravity


What is air moving parallel to the ground called?

Horizontal force is motion parallel to the ground.


What is a pike jump in trampolining?

A pike jump is where cheerleaders will jump off the ground and their legs are out in front of them with straight legs and pointed toed. Their heads face downward and their arms are straight out in front of them and parallel to each other.


How do you flex biceps?

Hold your arm straight out to the side parallel to the ground. Rotate it so that the palm of your hand faces upward. Make a fist. Pretend that you are lifting a heavy weight and bring your forearm perpendicular to the ground.


What does fetal position long mean?

Head to toe of the fetus is parallel to the ground Head to toe of the fetus is parallel to the ground


What kind of force causes the coin to fall?

Gravity is the force that causes the coin to fall. Gravity pulls objects toward the center of the Earth, which is why the coin drops to the ground when released.


When you walk on a slope you tend to bend why?

Background,All solids, including your body, have what we call "a center of mass". This is effectivily where the gravitational force (G) acts on the body.When you stand in a straight road, the normal force (henced called N), acts from the ground and up and balances gravitation. This is the basic understanding of why solids do not fall or accelerate through the ground. the force N, does allwayspoint straight up from the ground, while gravitation points to the center of earth.When you walk a slope, the forces G and N are no longer parallell, which causes gravitation to gain a momentum = G x r, where r is the distance from your center of mass, to where your feet touch the ground. This momentum intents to rotate you backwards and down the slope.The answer,By leaning forward you place your center of mass closer to the ground (decreasing 'r') and forces the N force to go parallell to G, which breaks gravity's momentum on your body. Hence you prevent falling backwards.


What force causes the ball to fall to the ground?

The force that causes the ball to fall to the ground is gravity. Gravity is a natural force that attracts objects towards each other, and in the case of the ball falling, it is being pulled towards the Earth's center by the force of gravity.


What is perpendicular and perallel?

Something which is perpendicular is at right angles an example would be that a tree growing straight out of the ground would be perpendicular to the ground. Things are parallel when they run along side each other always the same distance apart, an example would be railway tracks.